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vitamin K (phylloquinone)

Name vitamin K (phylloquinone)
Additional testing Determined are:
vitamin K1
vitamin K2 (MK-4)
vitamin K2 (MK-7)
Specimen requirements 2 ml of serum, deep-frozen
2 ml of EDTA plasma, deep-frozen
Procedure remarks Centrifuge blood directly after drawing. Pipette and freeze (approx. -20 °C). Store away from light (wrapped in aluminium foil).
Storage and transport protection from light,
deep-frozen transport and storage
Clinical utility bleeding tendency, long-term oral antibiotic therapy, parenteral nutrition, malabsorption
Methodology HPLC (high-performance liquid chromatography)
Reference ranges See findings report
Remarks Testing currently takes place in a contract laboratory